1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
/* Copyright 2001,2002,2003 Roger Dingledine, Matej Pfajfar. */
/* See LICENSE for licensing information */
/* $Id$ */
#include "../or/or.h"
struct logfile_t;
typedef struct logfile_t {
struct logfile_t *next;
const char *filename;
FILE *file;
int needs_close;
int loglevel;
int max_loglevel;
} logfile_t;
static INLINE const char *sev_to_string(int severity) {
switch(severity) {
case LOG_DEBUG: return "debug";
case LOG_INFO: return "info";
case LOG_WARN: return "warn";
case LOG_ERR: return "err";
default: assert(0); return "UNKNOWN";
}
}
static int loglevel = LOG_DEBUG;
static logfile_t *logfiles = NULL;
/* Format a log message into a fixed-sized buffer. (This is factored out
* of 'logv' so that we never format a message more than once.
*/
static INLINE void format_msg(char *buf, size_t buf_len,
int severity, const char *funcname,
const char *format, va_list ap)
{
time_t t;
struct timeval now;
int n;
buf_len -= 2; /* subtract 2 characters so we have room for \n\0 */
tor_gettimeofday(&now);
t = (time_t)now.tv_sec;
n = strftime(buf, buf_len, "%b %d %H:%M:%S", localtime(&t));
n += snprintf(buf+n, buf_len-n,
".%.3ld [%s] ",
(long)now.tv_usec / 1000, sev_to_string(severity));
if(n > buf_len)
n = buf_len-1; /* the *nprintf funcs return how many bytes they
* _would_ print, if the output is truncated.
* Subtract one because the count doesn't include the \0 */
if (funcname) {
n += snprintf(buf+n, buf_len-n, "%s(): ", funcname);
if(n > buf_len)
n = buf_len-1;
}
n += vsnprintf(buf+n,buf_len-n,format,ap);
if(n > buf_len)
n = buf_len-1;
buf[n]='\n';
buf[n+1]='\0';
}
static void
logv(int severity, const char *funcname, const char *format, va_list ap)
{
char buf[10024];
int formatted = 0;
logfile_t *lf;
assert(format);
if (severity < loglevel)
return;
for (lf = logfiles; lf; lf = lf->next) {
if (severity < lf->loglevel || severity > lf->max_loglevel)
continue;
if (!lf->file)
continue;
if (!formatted) {
format_msg(buf, 10024, severity, funcname, format, ap);
formatted = 1;
}
fputs(buf, lf->file);
fflush(lf->file);
/* XXX check for EOF */
}
}
void
log_set_severity(int severity)
{
loglevel = severity;
}
/* Outputs a message to stdout */
void _log(int severity, const char *format, ...)
{
va_list ap;
va_start(ap,format);
logv(severity, NULL, format, ap);
va_end(ap);
}
void _log_fn(int severity, const char *fn, const char *format, ...)
{
va_list ap;
va_start(ap,format);
logv(severity, fn, format, ap);
va_end(ap);
}
void close_logs()
{
logfile_t *next, *lf;
for (lf = logfiles; lf; lf = lf->next) {
if (lf->needs_close)
fclose(lf->file);
next = lf->next;
free(lf);
}
logfiles = NULL;
}
void reset_logs()
{
logfile_t *lf;
for (lf = logfiles; lf; lf = lf->next) {
if (lf->needs_close) {
fclose(lf->file);
lf->file = fopen(lf->filename, "a");
}
}
}
void add_stream_log(int loglevel, const char *name, FILE *stream)
{
logfile_t *lf;
lf = tor_malloc(sizeof(logfile_t));
lf->filename = name;
lf->needs_close = 0;
lf->loglevel = loglevel;
lf->max_loglevel = LOG_ERR;
lf->file = stream;
lf->next = logfiles;
logfiles = lf;
}
int add_file_log(int loglevel, const char *filename)
{
FILE *f;
f = fopen(filename, "a");
if (!f) return -1;
add_stream_log(loglevel, filename, f);
logfiles->needs_close = 1;
return 0;
}
|